{
  "manageEntity": {
    "action": "Save",
    "entityId": "2033384594",
    "entityType": "Track",
    "nonce": "0x858db14b8e0d7fb05dbc76f64bbcb1537a7438704a95f9ea464f3eeff172c7cc",
    "signature": "0xb16a9ca53402dfa7d359fc5362963ebc6a9490894d281334b291584babc280f747adb92b7813663eabc6148c52046b0090629231dbd6d21d1f59fe0b976d482e1b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}